source: palm/trunk/SOURCE/diffusivities.f90 @ 667

Last change on this file since 667 was 667, checked in by suehring, 11 years ago

summary:


Gryschka:

  • Coupling with different resolution and different numbers of PEs in ocean and atmosphere is available
  • Exchange of u and v from ocean surface to atmosphere surface
  • Mirror boundary condition for u and v at the bottom are replaced by dirichlet boundary conditions
  • Inflow turbulence is now defined by flucuations around spanwise mean
  • Bugfixes for cyclic_fill and constant_volume_flow

Suehring:

  • New advection added ( Wicker and Skamarock 5th order ), therefore:
    • New module advec_ws.f90
    • Modified exchange of ghost boundaries.
    • Modified evaluation of turbulent fluxes
    • New index bounds nxlg, nxrg, nysg, nyng

advec_ws.f90


Advection scheme for scalars and momentum using the flux formulation of
Wicker and Skamarock 5th order.
Additionally the module contains of a routine using for initialisation and
steering of the statical evaluation. The computation of turbulent fluxes takes
place inside the advection routines.
In case of vector architectures Dirichlet and Radiation boundary conditions are
outstanding and not available. Furthermore simulations within topography are
not possible so far. A further routine local_diss_ij is available and is used
if a control of dissipative fluxes is desired.

check_parameters.f90


Exchange of parameters between ocean and atmosphere via PE0
Check for illegal combination of ws-scheme and timestep scheme.
Check for topography and ws-scheme.
Check for not cyclic boundary conditions in combination with ws-scheme and
loop_optimization = 'vector'.
Check for call_psolver_at_all_substeps and ws-scheme for momentum_advec.

Different processor/grid topology in atmosphere and ocean is now allowed!
Bugfixes in checking for conserve_volume_flow_mode.

exchange_horiz.f90


Dynamic exchange of ghost points with nbgp_local to ensure that no useless
ghost points exchanged in case of multigrid. type_yz(0) and type_xz(0) used for
normal grid, the remaining types used for the several grid levels.
Exchange is done via MPI-Vectors with a dynamic value of ghost points which
depend on the advection scheme. Exchange of left and right PEs is 10% faster
with MPI-Vectors than without.

flow_statistics.f90


When advection is computed with ws-scheme, turbulent fluxes are already
computed in the respective advection routines and buffered in arrays
sums_xxxx_ws_l(). This is due to a consistent treatment of statistics
with the numerics and to avoid unphysical kinks near the surface. So some if-
requests has to be done to dicern between fluxes from ws-scheme other advection
schemes. Furthermore the computation of z_i is only done if the heat flux
exceeds a minimum value. This affects only simulations of a neutral boundary
layer and is due to reasons of computations in the advection scheme.

inflow_turbulence.f90


Using nbgp recycling planes for a better resolution of the turbulent flow near
the inflow.

init_grid.f90


Definition of new array bounds nxlg, nxrg, nysg, nyng on each PE.
Furthermore the allocation of arrays and steering of loops is done with these
parameters. Call of exchange_horiz are modified.
In case of dirichlet bounday condition at the bottom zu(0)=0.0
dzu_mg has to be set explicitly for a equally spaced grid near bottom.
ddzu_pres added to use a equally spaced grid near bottom.

init_pegrid.f90


Moved determination of target_id's from init_coupling
Determination of parameters needed for coupling (coupling_topology, ngp_a, ngp_o)
with different grid/processor-topology in ocean and atmosphere

Adaption of ngp_xy, ngp_y to a dynamic number of ghost points.
The maximum_grid_level changed from 1 to 0. 0 is the normal grid, 1 to
maximum_grid_level the grids for multigrid, in which 0 and 1 are normal grids.
This distinction is due to reasons of data exchange and performance for the
normal grid and grids in poismg.
The definition of MPI-Vectors adapted to a dynamic numer of ghost points.
New MPI-Vectors for data exchange between left and right boundaries added.
This is due to reasons of performance (10% faster).

ATTENTION: nnz_x undefined problem still has to be solved!!!!!!!!
TEST OUTPUT (TO BE REMOVED) logging mpi2 ierr values

parin.f90


Steering parameter dissipation_control added in inipar.

Makefile


Module advec_ws added.

Modules


Removed u_nzb_p1_for_vfc and v_nzb_p1_for_vfc

For coupling with different resolution in ocean and atmophere:
+nx_a, +nx_o, ny_a, +ny_o, ngp_a, ngp_o, +total_2d_o, +total_2d_a,
+coupling_topology

Buffer arrays for the left sided advective fluxes added in arrays_3d.
+flux_s_u, +flux_s_v, +flux_s_w, +diss_s_u, +diss_s_v, +diss_s_w,
+flux_s_pt, +diss_s_pt, +flux_s_e, +diss_s_e, +flux_s_q, +diss_s_q,
+flux_s_sa, +diss_s_sa
3d arrays for dissipation control added. (only necessary for vector arch.)
+var_x, +var_y, +var_z, +gamma_x, +gamma_y, +gamma_z
Default of momentum_advec and scalar_advec changed to 'ws-scheme' .
+exchange_mg added in control_parameters to steer the data exchange.
Parameters +nbgp, +nxlg, +nxrg, +nysg, +nyng added in indices.
flag array +boundary_flags added in indices to steer the degradation of order
of the advective fluxes when non-cyclic boundaries are used.
MPI-datatypes +type_y, +type_y_int and +type_yz for data_exchange added in
pegrid.
+sums_wsus_ws_l, +sums_wsvs_ws_l, +sums_us2_ws_l, +sums_vs2_ws_l,
+sums_ws2_ws_l, +sums_wspts_ws_l, +sums_wssas_ws_l, +sums_wsqs_ws_l
and +weight_substep added in statistics to steer the statistical evaluation
of turbulent fluxes in the advection routines.
LOGICALS +ws_scheme_sca and +ws_scheme_mom added to get a better performance
in prognostic_equations.
LOGICAL +dissipation_control control added to steer numerical dissipation
in ws-scheme.

Changed length of string run_description_header

pres.f90


New allocation of tend when ws-scheme and multigrid is used. This is due to
reasons of perforance of the data_exchange. The same is done with p after
poismg is called.
nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng when no
multigrid is used. Calls of exchange_horiz are modified.

bugfix: After pressure correction no volume flow correction in case of
non-cyclic boundary conditions
(has to be done only before pressure correction)

Call of SOR routine is referenced with ddzu_pres.

prognostic_equations.f90


Calls of the advection routines with WS5 added.
Calls of ws_statistics added to set the statistical arrays to zero after each
time step.

advec_particles.f90


Declaration of de_dx, de_dy, de_dz adapted to additional ghost points.
Furthermore the calls of exchange_horiz were modified.

asselin_filter.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

average_3d_data.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

boundary_conds.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng
Removed mirror boundary conditions for u and v at the bottom in case of
ibc_uv_b == 0. Instead, dirichelt boundary conditions (u=v=0) are set
in init_3d_model

calc_liquid_water_content.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

calc_spectra.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for
allocation of tend.

check_open.f90


Output of total array size was adapted to nbgp.

data_output_2d.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
allocation of arrays local_2d and total_2d.
Calls of exchange_horiz are modified.

data_output_2d.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
allocation of arrays. Calls of exchange_horiz are modified.
Skip-value skip_do_avs changed to a dynamic adaption of ghost points.

data_output_mask.f90


Calls of exchange_horiz are modified.

diffusion_e.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_s.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_u.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_v.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_w.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusivities.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusivities.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.
Calls of exchange_horiz are modified.

exchange_horiz_2d.f90


Dynamic exchange of ghost points with nbgp, which depends on the advection
scheme. Exchange between left and right PEs is now done with MPI-vectors.

global_min_max.f90


Adapting of the index arrays, because MINLOC assumes lowerbound
at 1 and not at nbgp.

init_3d_model.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
allocation of arrays. Calls of exchange_horiz are modified.
Call ws_init to initialize arrays needed for statistical evaluation and
optimization when ws-scheme is used.
Initial volume flow is now calculated by using the variable hom_sum.
Therefore the correction of initial volume flow for non-flat topography
removed (removed u_nzb_p1_for_vfc and v_nzb_p1_for_vfc)
Changed surface boundary conditions for u and v in case of ibc_uv_b == 0 from
mirror bc to dirichlet boundary conditions (u=v=0), so that k=nzb is
representative for the height z0

Bugfix: type conversion of '1' to 64bit for the MAX function (ngp_3d_inner)

init_coupling.f90


determination of target_id's moved to init_pegrid

init_pt_anomaly.f90


Call of exchange_horiz are modified.

init_rankine.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.
Calls of exchange_horiz are modified.

init_slope.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

header.f90


Output of advection scheme.

poismg.f90


Calls of exchange_horiz are modified.

prandtl_fluxes.f90


Changed surface boundary conditions for u and v from mirror bc to dirichelt bc,
therefore u(uzb,:,:) and v(nzb,:,:) is now representative for the height z0
nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

production_e.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

read_3d_binary.f90


+/- 1 replaced with +/- nbgp when swapping and allocating variables.

sor.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.
Call of exchange_horiz are modified.
bug removed in declaration of ddzw(), nz replaced by nzt+1

subsidence.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

sum_up_3d_data.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

surface_coupler.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in
MPI_SEND() and MPI_RECV.
additional case for nonequivalent processor and grid topopolgy in ocean and
atmosphere added (coupling_topology = 1)

Added exchange of u and v from Ocean to Atmosphere

time_integration.f90


Calls of exchange_horiz are modified.
Adaption to slooping surface.

timestep.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

user_3d_data_averaging.f90, user_data_output_2d.f90, user_data_output_3d.f90,
user_actions.f90, user_init.f90, user_init_plant_canopy.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

user_read_restart_data.f90


Allocation with nbgp.

wall_fluxes.f90


nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

write_compressed.f90


Array bounds and nx, ny adapted with nbgp.

sor.f90


bug removed in declaration of ddzw(), nz replaced by nzt+1

  • Property svn:keywords set to Id
File size: 6.2 KB
Line 
1 SUBROUTINE diffusivities( var, var_reference )
2
3!------------------------------------------------------------------------------!
4! Current revisions:
5! -----------------
6! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng
7!
8! Former revisions:
9! -----------------
10! $Id: diffusivities.f90 667 2010-12-23 12:06:00Z suehring $
11!
12! 137 2007-11-28 08:50:10Z letzel
13! Bugfix for summation of sums_l_l for flow_statistics
14! Vertical scalar profiles now based on nzb_s_inner and ngp_2dh_s_inner.
15!
16! 97 2007-06-21 08:23:15Z raasch
17! Adjustment of mixing length calculation for the ocean version.
18! This is also a bugfix, because the height above the topography is now
19! used instead of the height above level k=0.
20! theta renamed var, dpt_dz renamed dvar_dz, +new argument var_reference
21! use_pt_reference renamed use_reference
22!
23! 57 2007-03-09 12:05:41Z raasch
24! Reference temperature pt_reference can be used in buoyancy term
25!
26! RCS Log replace by Id keyword, revision history cleaned up
27!
28! Revision 1.24  2006/04/26 12:16:26  raasch
29! OpenMP optimization (+sums_l_l_t), sqrt_e must be private
30!
31! Revision 1.1  1997/09/19 07:41:10  raasch
32! Initial revision
33!
34!
35! Description:
36! ------------
37! Computation of the turbulent diffusion coefficients for momentum and heat
38! according to Prandtl-Kolmogorov
39!------------------------------------------------------------------------------!
40
41    USE arrays_3d
42    USE control_parameters
43    USE grid_variables
44    USE indices
45    USE pegrid
46    USE statistics
47
48    IMPLICIT NONE
49
50    INTEGER ::  i, j, k, omp_get_thread_num, sr, tn
51
52    REAL    ::  dvar_dz, l_stable, var_reference
53
54    REAL, SAVE ::  phi_m = 1.0
55
56    REAL    ::  var(nzb:nzt+1,nysg:nyng,nxlg:nxrg)
57
58    REAL, DIMENSION(1:nzt) ::  l, ll, sqrt_e
59
60
61!
62!-- Default thread number in case of one thread
63    tn = 0
64
65!
66!-- Initialization for calculation of the mixing length profile
67    sums_l_l = 0.0
68
69!
70!-- Compute the turbulent diffusion coefficient for momentum
71    !$OMP PARALLEL PRIVATE (dvar_dz,i,j,k,l,ll,l_stable,phi_m,sqrt_e,sr,tn)
72!$  tn = omp_get_thread_num()
73
74    !$OMP DO
75    DO  i = nxlg, nxrg
76       DO  j = nysg, nyng
77
78!
79!--       Compute the Phi-function for a possible adaption of the mixing length
80!--       to the Prandtl mixing length
81          IF ( adjust_mixing_length  .AND.  prandtl_layer )  THEN
82             IF ( rif(j,i) >= 0.0 )  THEN
83                phi_m = 1.0 + 5.0 * rif(j,i)
84             ELSE
85                phi_m = 1.0 / SQRT( SQRT( 1.0 - 16.0 * rif(j,i) ) )
86             ENDIF
87          ENDIF
88         
89!
90!--       Introduce an optional minimum tke
91          IF ( e_min > 0.0 )  THEN
92             DO  k = nzb_s_inner(j,i)+1, nzt
93                e(k,j,i) = MAX( e(k,j,i), e_min )
94             ENDDO
95          ENDIF
96
97!
98!--       Calculate square root of e in a seperate loop, because it is used
99!--       twice in the next loop (better vectorization)
100          DO  k = nzb_s_inner(j,i)+1, nzt
101             sqrt_e(k) = SQRT( e(k,j,i) )
102          ENDDO
103
104!
105!--       Determine the mixing length
106          DO  k = nzb_s_inner(j,i)+1, nzt
107             dvar_dz = atmos_ocean_sign * &  ! inverse effect of pt/rho gradient
108                       ( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k)
109             IF ( dvar_dz > 0.0 ) THEN
110                IF ( use_reference )  THEN
111                   l_stable = 0.76 * sqrt_e(k) / &
112                                     SQRT( g / var_reference * dvar_dz ) + 1E-5
113                ELSE
114                   l_stable = 0.76 * sqrt_e(k) / &
115                                     SQRT( g / var(k,j,i) * dvar_dz ) + 1E-5
116                ENDIF
117             ELSE
118                l_stable = l_grid(k)
119             ENDIF
120!
121!--          Adjustment of the mixing length
122             IF ( wall_adjustment )  THEN
123                l(k)  = MIN( l_wall(k,j,i), l_grid(k), l_stable )
124                ll(k) = MIN( l_wall(k,j,i), l_grid(k) )
125             ELSE
126                l(k)  = MIN( l_grid(k), l_stable )
127                ll(k) = l_grid(k)
128             ENDIF
129             IF ( adjust_mixing_length  .AND.  prandtl_layer )  THEN
130                l(k)  = MIN( l(k),  kappa * &
131                                    ( zu(k) - zw(nzb_s_inner(j,i)) ) / phi_m )
132                ll(k) = MIN( ll(k), kappa * &
133                                    ( zu(k) - zw(nzb_s_inner(j,i)) ) / phi_m )
134             ENDIF
135
136!
137!--          Compute diffusion coefficients for momentum and heat
138             km(k,j,i) = 0.1 * l(k) * sqrt_e(k)
139             kh(k,j,i) = ( 1.0 + 2.0 * l(k) / ll(k) ) * km(k,j,i)
140
141          ENDDO
142
143!
144!--       Summation for averaged profile (cf. flow_statistics)
145!--       (the IF statement still requires a performance check on NEC machines)
146          DO  sr = 0, statistic_regions
147             IF ( rmask(j,i,sr) /= 0.0 .AND.  &
148                  i >= nxl .AND. i <= nxr .AND. j >= nys .AND. j <= nyn )  THEN
149                DO  k = nzb_s_inner(j,i)+1, nzt
150                   sums_l_l(k,sr,tn) = sums_l_l(k,sr,tn) + l(k)
151                ENDDO
152             ENDIF
153          ENDDO
154
155       ENDDO
156    ENDDO
157
158    sums_l_l(nzt+1,:,tn) = sums_l_l(nzt,:,tn)   ! quasi boundary-condition for
159                                                  ! data output
160
161    !$OMP END PARALLEL
162
163!
164!-- Set vertical boundary values (Neumann conditions both at bottom and top).
165!-- Horizontal boundary conditions at vertical walls are not set because
166!-- so far vertical walls require usage of a Prandtl-layer where the boundary
167!-- values of the diffusivities are not needed
168    !$OMP PARALLEL DO
169    DO  i = nxlg, nxrg
170       DO  j = nysg, nyng
171          km(nzb_s_inner(j,i),j,i) = km(nzb_s_inner(j,i)+1,j,i)
172          km(nzt+1,j,i)            = km(nzt,j,i)
173          kh(nzb_s_inner(j,i),j,i) = kh(nzb_s_inner(j,i)+1,j,i)
174          kh(nzt+1,j,i)            = kh(nzt,j,i)
175       ENDDO
176    ENDDO
177
178!
179!-- Set Neumann boundary conditions at the outflow boundaries in case of
180!-- non-cyclic lateral boundaries
181    IF ( outflow_l )  THEN
182       km(:,:,nxl-1) = km(:,:,nxl)
183       kh(:,:,nxl-1) = kh(:,:,nxl)
184    ENDIF
185    IF ( outflow_r )  THEN
186       km(:,:,nxr+1) = km(:,:,nxr)
187       kh(:,:,nxr+1) = kh(:,:,nxr)
188    ENDIF
189    IF ( outflow_s )  THEN
190       km(:,nys-1,:) = km(:,nys,:)
191       kh(:,nys-1,:) = kh(:,nys,:)
192    ENDIF
193    IF ( outflow_n )  THEN
194       km(:,nyn+1,:) = km(:,nyn,:)
195       kh(:,nyn+1,:) = kh(:,nyn,:)
196    ENDIF
197
198
199 END SUBROUTINE diffusivities
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